CN102888121A - High-resilience silicon rubber and preparation method thereof - Google Patents
High-resilience silicon rubber and preparation method thereof Download PDFInfo
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- CN102888121A CN102888121A CN2012103917899A CN201210391789A CN102888121A CN 102888121 A CN102888121 A CN 102888121A CN 2012103917899 A CN2012103917899 A CN 2012103917899A CN 201210391789 A CN201210391789 A CN 201210391789A CN 102888121 A CN102888121 A CN 102888121A
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Abstract
The invention discloses a high-resilience silicon rubber and a preparation method thereof. The silicon rubber is compounded from unvulcanized rubber and a reinforcing material in a kneader through physical changes and chemical changes. The silicon rubber has high resilience, and can satisfy the special requirements for certain products in the market. Meanwhile, the hardness, tearing strength, elongation at break and the like of the silicon rubber are not changed obviously, thereby widening the application area of the silicon rubber.
Description
Technical field
The present invention relates to a kind of silicon rubber with high resilience energy and preparation method thereof, belong to the elastomeric material technical field.
Background technology
High-temperature silicon disulfide rubber is the macromolecular material that has organic materials and inorganic materials performance concurrently, has the flexible network structure.Silicon rubber is because rebound resilience is good, and compression set is less, can be used as the manufacturing raw material of kitchen tackle, shaft seal circle, packing ring, nipple, sundries joint and office equipment etc., has wide range of applications.Development along with science and technology, rebound performance to silicon rubber is also had higher requirement, high-temperature silicon disulfide rubber of the prior art since rebound degree is low can not satisfying the market on the particular requirement of some product, thereby, improve the rebound performance of high-temperature silicon disulfide rubber, the Application Areas of widening silicon rubber is the problem of the art active research.
Summary of the invention
The object of the invention is to overcome defective of the prior art, a kind of silicon rubber with high resilience energy and preparation method thereof is provided, the silicon rubber of the method for the invention preparation has very high rebound performance, but the particular requirement of some product on the satisfying the market, hardness, tear strength and the elongation at break etc. of silicon rubber have no significant change simultaneously.
The present invention is achieved by the following technical programs.
A kind of silicon rubber with high resilience energy, its moiety is counted with mass parts:
100 parts of methyl vinyl silicon kautschuks
White carbon black 37-53 part
Hydroxy silicon oil 2-8 part
Zinic stearas 0.17-0.2 part
Silicone resin 3-7 part
2,5-dimethyl-2,5-bis(t-butylperoxy) hexane 1-2 part.
Above-mentioned a kind of silicon rubber with high resilience energy, wherein, the molecular-weight average of described methyl vinyl silicon kautschuk is 59-65 ten thousand, the quality percentage composition of vinyl is 0.03-8.0%.
Above-mentioned a kind of silicon rubber with high resilience energy, wherein, described white carbon black is vapor phase process or precipitated silica.
Above-mentioned a kind of preparation method with silicon rubber of high resilience energy, preparation process is as follows: methyl vinyl silicon kautschuk and Zinic stearas were mediated in vacuum kneader 3-5 minute, again with white carbon black, silicone resin and hydroxy silicon oil add in the vacuum kneader several times, fully stir after each the adding, compound is mixed, after sizing material is kneaded and formed, be warmed up to 160-180 ℃, heat refining 90-120 minute, then being evacuated to vacuum tightness is-0.07--0.05MPa, plastic emitting after vacuumizing 30-60 minute, then with sizing material thin-pass 3-5 time on opening rubber mixing machine, filter at rubber strainer again, obtain clean pure sizing material, then with this sizing material and 2,5-dimethyl-2,5-bis(t-butylperoxy) hexane mixes in opening rubber mixing machine, and on vulcanizing press, carry out molded vulcanization, curing temperature is 175-180 ℃, sulfide stress is 15-20MPa, curing time is 5-20min, can obtain described silicon rubber with high resilience energy.
Above-mentioned a kind of preparation method with silicon rubber of high resilience energy wherein, divides white carbon black, silicone resin and hydroxy silicon oil 4 times and adds in the vacuum kneader.
Above-mentioned a kind of have high resilience can the preparation method of silicon rubber, wherein, with sizing material thin-pass 4 times on opening rubber mixing machine.
Of the present invention have high resilience can silicon rubber be by rubber and supporting material in kneader through physical change with chemical transformation is mixing forms, supporting material is white carbon black and silicone resin, white carbon black can make the strength increase of sulphurated siliastic as supporting material, but because the reinforcing effect of white carbon black is very strong, for the network hole that makes silicon rubber becomes greatly to increase its rebound performance, the part supporting material is replaced by the weak silicone resin of reinforcing effect, silicone resin is by the silica structure cell formation, can form three-dimensional cross-linked reticulated structure after the curing, outstanding weathering resistance and anti-yellowing are arranged, not only do not increase other element impurity as strengthening agent, can also strengthen the performance of silicon rubber simultaneously.Hydroxy silicon oil is constitution controller, and Zinic stearas is releasing agent, and peroxide vulcanizing agent is selected is that the nontoxic high temperature vulcanized effect that has no irritating odor is good 2,5-dimethyl-2,5-bis(t-butylperoxy) hexane.Silicon rubber of the present invention has very high rebound performance, but the particular requirement of some product on the satisfying the market, and hardness, tear strength and the elongation at break etc. of silicon rubber have no significant change simultaneously, thereby have widened the Application Areas of silicon rubber.
Embodiment
Embodiment 1
A kind of preparation method with silicon rubber of high resilience energy, preparation process is as follows: 0.17 part of 100 parts of methyl vinyl silicon kautschuks and Zinic stearas was mediated 3 minutes in vacuum kneader, again with 37 parts of thermal silicas, 3 parts of silicone resin and hydroxy silicon oil add for 2 parts minutes 4 times in the vacuum kneader, fully stir after each the adding, initiatively the stirring velocity of stirring rake is 62 rev/mins, the stirring velocity of driven stirring rake is 56 rev/mins, compound is mixed, after sizing material is kneaded and formed, be warmed up to 160 ℃, heat refining 90 minutes, then being evacuated to vacuum tightness is-0.07MPa, plastic emitting after vacuumizing 30 minutes, again with sizing material thin-pass 3 times on two roller opening rubber mixing machines, then filter at rubber strainer, obtain clean pure sizing material, again with 2 of this sizing material and 1 part, 5-dimethyl-2,5-bis(t-butylperoxy) hexane mixes in opening rubber mixing machine, and on vulcanizing press, carry out molded vulcanization, curing temperature is 175 ℃, sulfide stress is 15MPa, and curing time is 5min, can obtain described silicon rubber with high resilience energy.
Embodiment 2
A kind of preparation method with silicon rubber of high resilience energy, preparation process is as follows: 0.19 part of 100 parts of methyl vinyl silicon kautschuks and Zinic stearas was mediated 4 minutes in vacuum kneader, again with 45 parts of precipitated silicas, 5 parts of silicone resin and hydroxy silicon oil add for 5 parts minutes 3 times in the vacuum kneader, fully stir after each the adding, initiatively the stirring velocity of stirring rake is 62 rev/mins, the stirring velocity of driven stirring rake is 56 rev/mins, compound is mixed, after sizing material is kneaded and formed, be warmed up to 170 ℃, heat refining 100 minutes, then being evacuated to vacuum tightness is-0.06MPa, plastic emitting after vacuumizing 45 minutes, again with sizing material thin-pass 4 times on two roller opening rubber mixing machines, then filter at rubber strainer, obtain clean pure sizing material, again with 2 of this sizing material and 1.5 parts, 5-dimethyl-2,5-bis(t-butylperoxy) hexane mixes in opening rubber mixing machine, and on vulcanizing press, carry out molded vulcanization, curing temperature is 178 ℃, sulfide stress is 18MPa, and curing time is 15min, can obtain described silicon rubber with high resilience energy.
Embodiment 3
A kind of preparation method with silicon rubber of high resilience energy, preparation process is as follows: 0.2 part of 100 parts of methyl vinyl silicon kautschuks and Zinic stearas was mediated 5 minutes in vacuum kneader, again with 53 parts of thermal silicas, 7 parts of silicone resin and hydroxy silicon oil add for 8 parts minutes 5 times in the vacuum kneader, fully stir after each the adding, initiatively the stirring velocity of stirring rake is 62 rev/mins, the stirring velocity of driven stirring rake is 56 rev/mins, compound is mixed, after sizing material is kneaded and formed, be warmed up to 180 ℃, heat refining 120 minutes, then being evacuated to vacuum tightness is-0.05MPa, plastic emitting after vacuumizing 60 minutes, again with sizing material thin-pass 5 times on two roller opening rubber mixing machines, then filter at rubber strainer, obtain clean pure sizing material, again with 2 of this sizing material and 2 parts, 5-dimethyl-2,5-bis(t-butylperoxy) hexane mixes in opening rubber mixing machine, and on vulcanizing press, carry out molded vulcanization, curing temperature is 180 ℃, sulfide stress is 20MPa, and curing time is 20min, can obtain described silicon rubber with high resilience energy.
Product performance:
According to national standard silicon rubber of the present invention is tested, the result is as follows:
| Test event | Test result | Testing standard |
| Shore hardness | 49HA | GB?531-83? |
| Tensile strength | 39.6MPa | GB?528-92? |
| Tension fracture elongation rate | 2.1% | GB?528-92? |
| Compression deformation rate | 27% | HG/T?2876-1997 |
| Rebound degree | 80% | GB/T?1681-2009 |
Here description of the invention and application is illustrative, is not to want that therefore, the present invention is not subjected to the restriction of the present embodiment with scope restriction of the present invention in the above-described embodiments, and the technical scheme that any employing equivalence replacement obtains is all in the scope of protection of the invention.
Claims (6)
1. the silicon rubber with high resilience energy is characterized in that, its moiety is counted with mass parts:
100 parts of methyl vinyl silicon kautschuks
White carbon black 37-53 part
Hydroxy silicon oil 2-8 part
Zinic stearas 0.17-0.2 part
Silicone resin 3-7 part
2,5-dimethyl-2,5-bis(t-butylperoxy) hexane 1-2 part.
2. a kind of silicon rubber with high resilience energy as claimed in claim 1 is characterized in that, the molecular-weight average of described methyl vinyl silicon kautschuk is 59-65 ten thousand, and the quality percentage composition of vinyl is 0.03-8.0%.
3. a kind of silicon rubber with high resilience energy as claimed in claim 1 is characterized in that, described white carbon black is vapor phase process or precipitated silica.
As claimed in claim 1 a kind of have high resilience can the preparation method of silicon rubber, it is characterized in that, preparation process is as follows: methyl vinyl silicon kautschuk and Zinic stearas were mediated in vacuum kneader 3-5 minute, again with white carbon black, silicone resin and hydroxy silicon oil add in the vacuum kneader several times, fully stir after each the adding, compound is mixed, after sizing material is kneaded and formed, be warmed up to 160-180 ℃, heat refining 90-120 minute, then being evacuated to vacuum tightness is-0.07--0.05MPa, plastic emitting after vacuumizing 30-60 minute, then with sizing material thin-pass 3-5 time on opening rubber mixing machine, filter at rubber strainer again, obtain clean pure sizing material, then with this sizing material and 2,5-dimethyl-2,5-bis(t-butylperoxy) hexane mixes in opening rubber mixing machine, and on vulcanizing press, carry out molded vulcanization, curing temperature is 175-180 ℃, sulfide stress is 15-20MPa, curing time is 5-20min, can obtain described silicon rubber with high resilience energy.
5. a kind of preparation method with silicon rubber of high resilience energy as claimed in claim 4 is characterized in that, divides white carbon black, silicone resin and hydroxy silicon oil 4 times and adds in the vacuum kneader.
As claimed in claim 4 a kind of have high resilience can the preparation method of silicon rubber, it is characterized in that, with sizing material thin-pass 4 times on opening rubber mixing machine.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312163A (en) * | 2014-09-19 | 2015-01-28 | 天长市荣盛有机硅科技有限公司 | High resilience silicon rubber material and preparation method thereof |
| CN104877623A (en) * | 2015-06-05 | 2015-09-02 | 烟台德邦先进硅材料有限公司 | High-adhesion and high-resilience organic silicone adhesive special for EMI (Electro Magnetic Interference) interface |
| CN105171625A (en) * | 2015-10-31 | 2015-12-23 | 赵雪雅 | Silica gel base material, silica gel tile abrading block and preparation method of silica gel tile abrading block |
| CN107446359A (en) * | 2017-09-11 | 2017-12-08 | 江苏天辰新材料股份有限公司 | A kind of sulphurated siliastic and preparation method thereof |
| CN109575609A (en) * | 2018-12-13 | 2019-04-05 | 华南协同创新研究院 | A kind of high transparency high resiliency firm silicone rubber material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775215A (en) * | 2009-01-13 | 2010-07-14 | 泉州七星电气有限公司 | Silicone rubber material for ageing-resistant composite insulator and preparation method thereof |
-
2012
- 2012-10-16 CN CN2012103917899A patent/CN102888121A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775215A (en) * | 2009-01-13 | 2010-07-14 | 泉州七星电气有限公司 | Silicone rubber material for ageing-resistant composite insulator and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312163A (en) * | 2014-09-19 | 2015-01-28 | 天长市荣盛有机硅科技有限公司 | High resilience silicon rubber material and preparation method thereof |
| CN104877623A (en) * | 2015-06-05 | 2015-09-02 | 烟台德邦先进硅材料有限公司 | High-adhesion and high-resilience organic silicone adhesive special for EMI (Electro Magnetic Interference) interface |
| CN105171625A (en) * | 2015-10-31 | 2015-12-23 | 赵雪雅 | Silica gel base material, silica gel tile abrading block and preparation method of silica gel tile abrading block |
| CN107446359A (en) * | 2017-09-11 | 2017-12-08 | 江苏天辰新材料股份有限公司 | A kind of sulphurated siliastic and preparation method thereof |
| CN109575609A (en) * | 2018-12-13 | 2019-04-05 | 华南协同创新研究院 | A kind of high transparency high resiliency firm silicone rubber material and preparation method thereof |
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Application publication date: 20130123 |